Air Force firefighters wait to respond to a simulated emergency during wartime-firefighting readiness training at Joint Base Elmendorf-Richardson, Alaska, Aug. 23, 2018. The airmen are firefighters assigned to the 673rd Civil Engineer Squadron. During the training they donned various levels of mission oriented protective posture gear and practiced responding to emergency situations in a simulated toxic environment during a chemical, biological, radiological or nuclear strike. Air Force photo by Alejandro Pena